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Sienna Miller said being the victim of phone hacking took a toll on her.

Phone-hacking victim Sienna Miller says she planted false stories with friends in an attempt to figure out why intimate details of her life were showing up in British tabloids.

Miller, an actress and former girlfriend of actor Jude Law, told NBC's "Today" show in an interview that aired Thursday that stories about her appeared in the newspaper that only her mother, sister, boyfriend and best friend knew about.

She accused some of the people close to her of selling stories to the press, she said. She'd plant the false stories to see if they appeared in the newspaper, and thus expose a person betraying her, but the false stories never appeared.

Miller said she also became suspicious when it became clear there were a large number of voice mail messages that friends said they'd left and she never received.

"Everything is compromised enormously," she said. "It had a huge impact on relationships, friendships and my career."